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What is the significance of Primary key class in Entity bean?

1 reply on 1 page. Most recent reply: Jul 18, 2003 11:38 PM by zenykx

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rclw

Posts: 1
Nickname: rclw
Registered: Jul, 2003

What is the significance of Primary key class in Entity bean? Posted: Jul 16, 2003 5:01 AM
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What is the significance of Primary key class in Entity bean?

As I go through a book which says

The primary key class for an entity bean class is used by the EJB container to uniquely identify an entity bean object.Each EJB Object is uniquely identified by its primary key object and the home interface referance.

Since there is home interface to identify the EJB object then why do we need Primary key class???


zenykx

Posts: 69
Nickname: zenykx
Registered: May, 2003

Re: What is the significance of Primary key class in Entity bean? Posted: Jul 18, 2003 11:38 PM
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Most of time entity beans got persisted in a database. As i suppose you know, a database row is identifyied by a primary key. So, in order your home interface to be able to retrieve the one and only entity bean you request you must uniquely identify it. So, you need a primary key.
Nice, ain't it!

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